meta-google: authorized-keys-comp: Add package

This adds a startup routine that compiles an authorized_keys file from
multiple locations in the filesystem, allowing for multiple providers
without clashing.

Change-Id: Ib26e04af42f29d42410154fdd809aa3a525fc9d5
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-google/ssh/authorized-keys-comp/authorized-keys-comp.service b/meta-google/recipes-google/ssh/authorized-keys-comp/authorized-keys-comp.service
new file mode 100644
index 0000000..92f9b26
--- /dev/null
+++ b/meta-google/recipes-google/ssh/authorized-keys-comp/authorized-keys-comp.service
@@ -0,0 +1,6 @@
+[Service]
+Type=oneshot
+ExecStart=/usr/libexec/authorized-keys-comp.sh
+
+[Install]
+WantedBy=multi-user.target